Calcium Thioglycolate Trihydrate

(Calcium Mercaptoacetate Trihydrate) CAS# 29820-13-1, EC# 249-881-5


Dr. Ralph Evans developed in Hoboken, New Jersey, in the early 1940s Thioglycolic Acid as an active material for cold wave permanents. Today mainly TGA salts are used in cosmetic applications for hair perms, straighteners and depilatories.

Ammonium Thioglycolate or Monoethanolamine Thioglycolate are used in cosmetics for hair perms and straigtheners whereas Calcium Thioglycolate or Potassium Thioglycolate are used in depilatories.

Historically for the marketed Calcium Thioglycolate always the CAS# 29820-13-1 has been used. Later it was discovered that the Calcium Thioglycolate is a Trihydrate for which now the CAS# 65208-41-5 is available. We maintained the historical CAS# as under this the Calcium Thioglycolate Trihydrate has been registered in many countries worldwide.

Sometimes also two other CAS# are mentioned, the 814-71-1, under which the Calcium Dithioglycolate is registered and the 5793-98-6 for the Calcium Dithioglycolate Trihydrate. But in both the ratio of Ca/TGA is 1/2 instead of 1/1 in the marketed product.


Calcium Thioglycolate's unique reducing properties of the SH-group opens the sulfur bridges in the ceratine structure of the hair and weakens the hair structure in the hair fibres and in the hair roots. Calcium Thioglycolate Trihydrate is a fine milled white powder with a very good performance due to its alcaline pH-value of 11 - 12.

Production Facilities

As leading producer of Calcium Thioglycolate BRUNO BOCK and EVANS CHEMETICS are providing state of the art quality from their production facility in Marschacht, Germany (near Hamburg) and excellent customer service from their sales offices in Marschacht and Teaneck, New Jersey, in the USA.


Calcium Thioglycolate Trihydrate is produced by BRUNO BOCK as high quality cosmetic grade powder and is used in depilatory formulations. The hygroscopic white powder is packaged in PE drums with double PE Inliners with a siccative bag in between.

Calcium Thioglycolate Trihydrate

Product Name



Calcium Thioglycolate Trihydrate99 %Powder


Products SDS Datasheet
    Calcium Thioglycolate Trihydrate